Roofing Square Explained. The term roofing square and roof pitch are the most commonly used terms in the roofing industry. 1 roofing square = 100 square feet. It does not matter how you arrive at 100 square feet. 10 feet x 10 feet = 100 square feet or 1 roofing square. 5 feet x 20 feet = 100 square feet or 1 roofing square.
How much does it cost to produce 1 gallon of ethanol?It will cost about $1.10 to $1.20/gal to make the alcohol from various feed-stocks like corn, barley, potatoes, or Jerusalem artichokes. You will also have by-products which you can sell or use as animal feed, reducing the total cost down to about $.95/gal.. If you do this on a large enough scale, it will cost anywhere form $0.95/gallon to $1.40/gal to make the alcohol, depending on your feedstock. Look at my web pages, Mashing and Fermentation and also,  Molasses and Rum .
The broad estimate for a do-it-yourself alcohol and drug test cost is anywhere between $10 and $50. The actual cost will depend on the retail price of the particular equipment and its narcotic substance scope. Case in point: a marijuana urine test may cost around $10 from Walgreens. The urine test price for screening more than one illegal drug at home is relatively higher. A particular example is a $38 urine test sold at Drugstore.com. As for hand-held breathalyzers for screening alcohol content, the price range is anywhere around $35 to $100. Lab Urine & Saliva